niobium oxide
- Formula: NbO
- Molecular weight: 108.9058
- IUPAC Standard InChI: InChI=1S/Nb.O
- IUPAC Standard InChIKey: BFRGSJVXBIWTCF-UHFFFAOYSA-N
- CAS Registry Number: 12034-57-0
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Other names: Niobium monoxide
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Solid Phase Heat Capacity (Shomate Equation)
Go To: Top, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Cp° = A + B*t + C*t2 + D*t3 +
E/t2
H° − H°298.15= A*t + B*t2/2 +
C*t3/3 + D*t4/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 −
E/(2*t2) + G
Cp = heat capacity (cal/mol*K)
H° = standard enthalpy (kcal/mol)
S° = standard entropy (cal/mol*K)
t = temperature (K) / 1000.
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| Temperature (K) | 298. - 2210. |
|---|---|
| A | 10.27806 |
| B | 2.114613 |
| C | 0.004440 |
| D | -0.001371 |
| E | -0.096227 |
| F | -103.7813 |
| G | 22.26568 |
| H | -100.3000 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in December, 1973 |
| Temperature (K) |
Cp (cal/mol*K) |
S° (cal/mol*K) |
-(G° - H°298.15)/T (cal/mol*K) |
H° - H°298.15 (kcal/mol) |
|---|---|---|---|---|
| 298. | 9.82 | 10.99 | 11.00 | -0.00 |
| 300. | 9.84 | 11.06 | 11.00 | 0.02 |
| 400. | 10.52 | 13.99 | 11.40 | 1.04 |
| 500. | 10.95 | 16.39 | 12.16 | 2.11 |
| 600. | 11.28 | 18.42 | 13.04 | 3.23 |
| 700. | 11.56 | 20.18 | 13.94 | 4.37 |
| 800. | 11.82 | 21.74 | 14.82 | 5.54 |
| 900. | 12.07 | 23.15 | 15.67 | 6.73 |
| 1000. | 12.30 | 24.43 | 16.48 | 7.95 |
| 1100. | 12.53 | 25.61 | 17.26 | 9.19 |
| 1200. | 12.75 | 26.71 | 18.00 | 10.46 |
| 1300. | 12.97 | 27.74 | 18.71 | 11.74 |
| 1400. | 13.19 | 28.71 | 19.39 | 13.05 |
| 1500. | 13.41 | 29.63 | 20.04 | 14.38 |
| 1600. | 13.63 | 30.50 | 20.67 | 15.73 |
| 1700. | 13.85 | 31.34 | 21.27 | 17.11 |
| 1800. | 14.06 | 32.13 | 21.85 | 18.50 |
| 1900. | 14.28 | 32.90 | 22.41 | 19.92 |
| 2000. | 14.49 | 33.64 | 22.96 | 21.36 |
| 2100. | 14.70 | 34.35 | 23.48 | 22.82 |
| 2200. | 14.92 | 35.04 | 23.99 | 24.30 |
References
Go To: Top, Solid Phase Heat Capacity (Shomate Equation), Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Chase, 1998
Chase, M.W., Jr.,
NIST-JANAF Themochemical Tables, Fourth Edition,
J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]
Notes
Go To: Top, Solid Phase Heat Capacity (Shomate Equation), References
- Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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